Aram,
measuring torque on an AC servos is definitely possible.
It is not as simple as measuring current but this does give some feedback.
I don't think that the current used by the servo drivers is a measure
but you try Stan's setup that way.
There are servo drivers with force-feedback but I an
Hi
I think mechanical measure can not be use because limits of on torque will
be digital and it should be part of NC program that can be program. That
digital limits will be part of program and where ever cutting tool start
having problem with cutting material and as a result of which pressure of
a
what about a spring coupler and 2 encoders? and do current measurements
while exerting known levels of torque, make a chart so you know how much
current = how much torque, use current monitoring... isolated ADC across
shunt resistors for each phase of each motor be it AC or DC. It'd jsut be
quit
On Tuesday 12 February 2008 04:55, W. Jacobs wrote:
> aram,
> It would be easier to measure current to the motor as this would be what
> creates the torque. Current measurement is easy.
> If you want to truly measure the torque, it is done either with a strain
> gauge on the shaft or with a spring
On Monday 11 February 2008, Dave Engvall wrote:
>Spindle load is certainly one way to do it. Whether you do spindle
>load or force your cam is going to have to
>do a good job of keeping the cutter load constant or you will end up
>setting the trip too high to do much good.
>The same is true in try
aram,
It would be easier to measure current to the motor as this would be what
creates the torque. Current measurement is easy.
If you want to truly measure the torque, it is done either with a strain
gauge on the shaft or with a spring coupled drive and measure the
deflection of the spring. E
Spindle load is certainly one way to do it. Whether you do spindle
load or force your cam is going to have to
do a good job of keeping the cutter load constant or you will end up
setting the trip too high to do much good.
The same is true in trying to control such things by setting
following
On Monday 11 February 2008, Dave Engvall wrote:
>IIRC - some years ago there was some talk about limiting force on
>each axis or the x,y vector.
>I don't think it is easy to do but something to think about. I have
>no idea how much difference there
>is between the forces for a 'good' cutter and a
IIRC - some years ago there was some talk about limiting force on
each axis or the x,y vector.
I don't think it is easy to do but something to think about. I have
no idea how much difference there
is between the forces for a 'good' cutter and a cutter on the edge
of going bad.
Something for
I'm not an expert on AC servos (or servos at all for that matter) but I
suppose the same tecnique could be used to measure torque on nearly any
motor, but keep in mind it is an offline process. This is not something
done directly by EMC or the motor controller.
The setup for my measurements:
Hi
Can you measure torque on AC servo motor?
Can I put that if torque exceed some certain level STOP machine or go to
feed hold mode. It is very important because torque can directly show
condition of cutter. If can stop machine when torque start increase I may
or better will prevent break of cutte
Doh! Of course, a link to my site would help:
http://www.theblossers.net/index.php?section=15
Stan Blosser wrote:
> I just posted a blog article on my site regarding my recent stepper
> torque measurement project. Not directly relating to EMC, but I felt
> it relevant enough to share here. :-
I just posted a blog article on my site regarding my recent stepper
torque measurement project. Not directly relating to EMC, but I felt it
relevant enough to share here. :-)
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